The most important companies in the world of technology has their own opinion about design and let us know what they think. Either if you are a completelly newie designer or a designer with a lot of professional background, it will be really worth to you to give a look to some of the next links:
Apple
iPhone & iPad (iOS) User Experience Guidelines
iPhone & iPad (iOS) User Interface Guidelines
Mac OS X User Experience Guidelines
Mac OS X User Interface Guidelines
Android User Interface Guidelines
Google TV Web Site Optimization Resources
Website Design & Content Guidelines
BlackBerry
Blackberry Browser Content Design Guidelines (PDF)
User Interface Guidelines for Blackberry Playbook Tablet
User Interface Guidelines for Blackberry Smartphones
Microsoft
Microsoft Surface User Experience Guidelines
Windows Mobile User Interface Guidelines
Windows Touch User Interface Guidelines
Windows User Experience & User Interface Guidelines
IBM
User experience guidelines for IBM Lotus rich client applications and plug-ins
Adobe
Adobe Flex UI Design and RIA Workflow
HP
User Interface Guidelines for Palm webOS
Motorola
Motorola Best Practices for Android User Interface
Nokia
Design & User Experience Library
Oracle
Design Guidelines for Oracle Applications
Java Look and Feel Design Guidelines (Sun Microsystems)
Samsung
Samsung bada Application User Interface Guide
SonyEricsson
